Fluorescence Detection Outcouplers for Microfluidic Light Management
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Solution Overview
Problem
In fluorescence detection systems, particularly in high aspect ratio microfluidic chambers, a significant portion of excitation light is lost, and emission light is not effectively directed towards the detection system, leading to inefficient compound tracking and diagnosis.
Innovation Solution
A fluorescence detection system with a microfluidic chamber and an outcoupler that diffuses excitation light to evenly fill the chamber, ensuring more light interacts with fluorophores, and a dispersion element to spatially separate emission light for improved detection, increasing the signal-to-noise ratio and capturing more excitation and emission light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If excitation light is introduced into high aspect ratio microfluidic chambers, then fluorophores can be excited for fluorescence detection, but a significant portion of excitation light is lost and not effectively utilized
Solution Approach 1:
The patent introduces outcouplers positioned at the sides of the microfluidic chamber to deliver excitation light from a lateral dimension rather than only from the top. This multi-dimensional light delivery approach ensures that excitation light reaches fluorophores throughout the high aspect ratio chamber more effectively, reducing light loss and improving utilization efficiency.
Solution Approach 2:
The outcouplers act as intermediary optical elements that couple excitation light from the illumination system into the microfluidic chamber. These outcouplers facilitate efficient light transfer and distribution throughout the chamber, ensuring maximum excitation light utilization while minimizing losses.
2Measurement precision
If emission light is generated by fluorophores in the microfluidic chamber, then target compound detection is enabled, but emission light is not effectively directed towards the detection system
Solution Approach 1:
The detection system is positioned to collect emission light from multiple dimensions, including lateral collection paths through the chamber walls. This multi-dimensional light collection approach increases the amount of emission light captured by the detection system, improving detection precision while reducing light loss.
Solution Approach 2:
The microfluidic chamber and optical system are designed to serve multiple functions: the same chamber that contains the sample also serves as an optical pathway for both excitation light delivery and emission light collection. This multi-functional design optimizes the system for both light delivery and light collection efficiency.
3Volume of moving object
If conventional fluorescence detection systems are used with high aspect ratio microfluidic chambers, then compact sample analysis is achieved, but detection efficiency is reduced due to light loss
Solution Approach 1:
The system maintains the compact high aspect ratio chamber geometry while introducing lateral outcouplers for excitation light delivery and multi-dimensional emission collection. This preserves the small sample volume advantage while dramatically improving detection efficiency through enhanced light management in multiple spatial dimensions.
Solution Approach 2:
The patent optimizes optical parameters including outcoupler positioning, illumination wavelength, and detection geometry to maximize light interaction within the compact chamber. By carefully tuning these parameters, the system achieves high detection efficiency despite the limited chamber volume and high aspect ratio geometry.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances the detection efficiency by utilizing a higher percentage of excitation light and emission light, resulting in improved target compound detection with a higher signal-to-noise ratio and enabling multiplexed fluorescence detection.
Implementation Method 1
an outcoupler that diffuses excitation light to evenly fill the chamber, ensuring more light interacts with fluorophores
Implementation Method 2
a fluorescence detection system with a microfluidic chamber and an outcoupler... excitation light to excite fluorophores in the microfluidic chamber
Implementation Method 3
a dispersion element to spatially separate emission light for improved detection, increasing the signal-to-noise ratio
Data Source
AI summary
In one example in accordance with the present disclosure, a fluorescence detection system is described. The fluorescence detection system includes a microfluidic chamber to receive a sample containing a compound to be detected. An illumination system provides an excitation light to excite fluorophores in the microfluidic chamber. An outcoupler is disposed between the illumination system and the microfluidic chamber to diffuse the excitation light to fill the microfluidic chamber. The fluorescence detection system also includes a detection system to detect fluorescence generated by the excitation of the fluorophores in the microfluidic chamber.